Liquid cock or valve



Feb, 28, 1950 a. J. M. JUNGERHANS LIQUID COCK OR VALVE 2 Sheets-Sheet 1 Filed Dec. 6, 1945 8. JM. Jungerhuns,

AHorney Feb. 28, 1950 I B. J. M. JUNGERHANS 2,499,318

LIQUID COCK'OR VALVE Filed Dec. 6, 1945 L ZShets-Shet 2 FIG. 3

I Inventor Bernnrdus J.M. Jungerhons,

Attorney Patented F eb. 28, 1950 LItiumcocK QRNAL'YEL Bernardu's- J oh'annes: Marie Jungerhansg; Voor burg; Netherlands}: assignor to Jam -.Iongerius: NY-JW, Jutphaasrfltrecht;Netherlands.

Application December 6,,1945, Serial. No.,633,195 InstlierN'eltlierlands September-V17; 19.43; Section 1;.RuhlicrLaw .699; Augusta-$1946.11

Patcntzcxnil'cs. September; 1751963 The invention relates' 12032; composite-liquid cook or valveserving to.control ,thegsupp y; and the discharge of f. liquidtd and from one onmore hydraulic motors adapted-to be locked" in adj 11sted positions, said :valve: comprising, in addition to a valve housing provided'iwithductsfor cone necting themotor conduits-andth'e conduits l'eadir ing to and from a pump .or like device, ,a-plug-rotatably mounted within saidlhousingand, pro;- vided'with passages and ports for establishing connections between the pump ducts andt'the motor ducts selected by rotation oip'the; plug. Many, designs of multi-way. plugvalves ,of "this typeare already known; TheseknoWrnvalves, however, are notcapable of "completely locking hydraulic motors operating atpvery, high. pressures, e. g, pressures exceeding,50"iatmospheres. Such a complete lockjisurequired," inter alia, in hydraulic liftingcylind'ers.

The, invention has forit's 0bjeCt1,tO;-pl'0Vldea cock permitting to reliably close theli'quidjcomduits even when the liquidfpressure isvery high. The invention consists in this, that "each motor duct is provided with a check.valve; preferably a ball valve; seating in .the direction towards the plug, and that said plug has an individuallyqcon trolled device for'liftingthe' check valve ,in' the selectedmotor duct; which is to beconnected'; to the suction conduit ofythe-pump. In'such", a valve device, the plug only servesto select' the" path e of. the liquid, whereas the locking; operation:- is carried out" by the check yalves;

Assuming therrequired liquid pressure. to; be produced by a continuously drivenpumpmfth'e kind, whichlocks itself'wh'enits pressurerconduit is closed, it is necessary to open a bye pass allowing the continuously supplied illiquidto be discharged when the supply andi'thev discharge conduits of vallmotors. are clo'sedi, Tmthatend,

the valve. plug can be providedwith'a supply passage permanently communicating with the connecting duct for, thepressureaconduit of the pump, and with a discharge passage permanently communicating-with the connecting duc-t'forthe suction conduit of the pump, said-supplypassage and said discharge-passage:beinafinterconnected by a third passage providedwith a valve closed simultaneously with, or in hehalL of, thesopera tion ofithel check" valve lifting device;

According tothe invention; thegseleotediclieck valve maybe lifted mechanically or hydrauiicaily. The valve may be liftedme'ch'anically by means of a dog, which maybe. operated," for instance by meansof the lever for turning-the plug. Inprder that it .may be liftedhydraulically, the. dog ,may be connected to a piston, which'on one side is exposed to the pressure of the liquid in the supply passage, and on the other side to the pressure of the liquid in the discharge passage of the plug. The closure of the connecting passage produces a fit 2* dfigrence-of-pressure, whereby the piston is actua e According to::the: invention; thecock may-advantageously-be constituted in such a, manner, that the motorduc-ts-are arangedwithinjthevalve housing 'ina circular series around the plug, the check valves being" adapted 'to move-in: radial directions; and'be,- lifted by a; radially extending dog; slid'ably -mounted in the valve, plug;

In ,orderto elucidate the invention, referenceis had'to thedrawing;whichillustrates, by way of example, two embodiments thereof; in-the drawmgz" Fig. "1' is an axial, sectional view of one embodiment of theinvention,

Figr-Z is" a p1an :view' of the valve according'to Fig; 1,1and

Fig. 3 is-anaxial, sectional viewof asecond embodiment.

The liquid valve as shown in- Figs. land 2consistsof-"a valve housing I in which a plug 2'is-rotatably mounted; The plug is confined between a-cover-plate 3', composed'of two-or moreparts, and"a-bottom-platel. Said housing is provided withtwo-ducts 5- and-6 for-connectinga'through conduitionthepump: and with six ducts l, 8, 9:10; ll-and-lzgwhich are arranged in a circle around the plug-and destined for connecting the conduits leadingto and from three hydraulic motors (not shown), e.- g. double acting cylinders providecl with pistons. The conduits appertainingto one *andthe same motor are connected to the valve-housing in-point'sdiametricallyopposite each other, Mounted in each duct for the'connection' of -'a motorconduit is a ball' I4 loadedby aspring l3 l and constituting, in conjunction with a-seat a check valve-seatingina direction towards theplug: The pumpductsfi and 6 open into annular channels l5 and I6, respectively.

Provided within the plug is a liquid supply passage Il' permanently communicating with the an.- nular groove l5 and" adapted to be connected selectively-to anyone of the six' motor ducts, and a -liquid" exhaust passage l8. permanently com municating with theannular groove l6 and adapted to be connected to the duct situated diametrically oppositethe selected motor duct. The passages l T and l 8 areinterconneeted by a third passage--19 adapted-to be closed "by a slide valve 20: said valve ismeunted for axial movement inttheaxis of the-plug and is;loaded by-aspring 2 l tending tomover-theannular groove 2 2 of the slide yalyerinto' register with the, connecting passage-iB so-asrto; open thalattenv Withaview-to closing the ,connectingpassage l9; thepslidevalve can be moved; against" the thrust of "the spring 2|, by means of a lever 23 also serving for turning the plug (Fig. 1). To that end, said lever is hinged to the plug by a transverse pin 24. Mounted within. the. plug is a radially slidable dog 25, by

means of which the ball valve in the discharge conduit of the selected hydraulic motor can be lifted. The dog is forced radially outward, when slide valve 20 is moved downward and the connecting passage I9 is closed. For that purpose the slide valve is bevelled at its lower end 26, said end cooperating with the bevelled end of the dog. The latter is retracted by a spring 21, as soon as the lever is released.

When the connecting passage I9 is closed, the dog is projected, so that the check valve in the duct for connecting the discharge conduit of the selected motor is opened, thus permitting the liquid to fiow from said conduit through exhaust passage I8, annular groove [6 and duct 6 to the suction side of the pump. Also, the pressure in the passage I! will exceed that in the motor duct 1 and the check valve M in said duct will be opened, allowing the selected hydraulic motor to be supplied with liquid under pressure.

If the lever is released, the connecting passage I9 is Opened, the dog is retracted and the ball valves 14 closed. The hydraulic motors are then looked in their adjusted positions, since liquid can neither flow to, nor from the same.

If the hydraulic motor is to be reversed, the plug, with its lever 23 pointing in an upwardly inclined direction, is turned through 180, whereupon the lever 23 is again pushed down.

The cock as shown in Fig. 3 differs from that according to Figs. 1 and 2 only in this, that the dog is forced out hydraulically, instead of mechanically, as soon as the slide valve 20 closes the connecting passage l9 so that the pressure in the introductory passage ll increases. To that end, the dog 25 is attached to a piston 28, one side of which is exposed to the pressure of the liquid in th supply passage H, the other side being exposed to the pressure of the liquid in the discharge passage [8. The piston is loaded by a spring 29 tending to retract the dog. The piston face should be larger than the opening of the check valve to be lifted. Moreover, the

piston should be capable of comprising the springs l3 and 29 when the pressure has its normal operating value. It will be apparent, that the dog will be forced out during the closure of the connecting passage I9 and retracted during the opening of said passage. The proper positions of the plug may be made visible by an indicatofand/or to be felt by a snap-action device.

Within the scope of the invention many details may be designed and arranged otherwise. It is not necessary to employ a slide valve in order to close and to open the connecting passage; a poppet valve for instance a conical valve, may be used instead. Nor is it necessary for the rotation of the plug and the control of the valve in the connecting passage to be carried out by .means of a common lever.

. 4 said grooves and serving for the connection of the pressure conduit of a pump, a second connecting duct in said housing permanently communicating with the other said annular groove and serving for the connection of the suction conduit of the pump, an even number of motor ducts arranged in said housing in a circular series around said plug, each pair of said motor ducts, which serve for the connection of the two conduits leading to the said hydraulic motor, opening by diametrically arranged ports toward said plug, check valves provided within the motor ducts and seating towards said plug, said check valves being adapted to be moved in radial directions, a supply passage provided in said plug, said passage permanently communicating with the said supply annular groove, an exhaust passage provided in said plug, said passage permanently communicating with the said exhaust groove, two diametrically arranged ports in said plug, said ports being adapted to cooperate with the ports by which the motor ducts open towards the plug, one of said ports communicating with said supply passage and the other with said exhaust passage, a third passage in said plug, said passage interconnecting said supply passage and said exhaust passage, a valve provided within said third passage, said valve being arranged to be controlled from the outside, a radially slidable spring loaded dog being mounted within said plug and adapted to be projected against the action of said spring through the port communicating with said exhaust passage and through the port of one of the motor ducts in order to lift the check valve in said duct and means for operating said check-valve-lifting-dog when said valve in the third plug passage is closed.

2. A composite liquid cock as claimed in claim 1, in which the valve provided within said third plug passage is shaped as a control pin operable from the outside and slidably mounted in a longitudinal bore in the plug, said control pin having a bevelled part adapted to be pushed against a bevelled part of the check-valve-lifting-dog so as to move said dog radially outwards against the action of a spring.

3. A composite liquid cock as claimed in claim 1, in which a piston is attached to the checkvalve-lifting-dog, the active surface of said piston being larger than the cross sectional area of the opening of each check valve, one face of said piston being exposed to the liquid pressure in said exhaust passage and the other to the liquid pressure in said supply passage.

BERNARDUS JOHANNES MARIE JUNGERHANS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,308,727 Temple Jan. 19, 1943 2,342,770 Temple Feb. 29, 1944 2,360,987 Temple Oct. 24, 1944 2,408,680 Pontius Oct. 1, 1946 FOREIGN PATENTS Number Country Date 510,916 Great Britain Aug. 10, 1939 

